Dodge 50 Handbook48 Fuel Pump / Engine speed

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Fuel Injection Pump

The fuel injection pump meters and delivers fuel oil to the injectors. It is built to extremely fine limits. Any mishandling or the entry of the smallest particles of dirt will impair its operation and could cause expensive damage. It is therefore, important that clean fuel be used and that attention only be given by your dealer.
The pump type and number - as given on a plate on the pump body - should be quoted in all correspondence concerning the pump.

Injectors

Providing that good-quality fuel is used and the fuel filtration system is properly maintained the fuel injectors will require minimal attention.
Cleaning and testing of injectors must only be carried out by your dealer at the recommended intervals.
A faulty injector is indicated by one or more of the following symptoms:-
a) Knocking in one or more cylinders
b) Engine overheating
c) Loss of power
d) smoky (black) exhaust
e) Increased fuel consumption
f) Misfiring

Engine Speed Adjustment

The adjustment screw on original fuel pumps is set and sealed by the manufacturer. The setting must not be interfered with as this could affect the engine warranty.
If a new pump has been fitted, check the maximum no load speed with the engine at its normal temperature of operation. If necessary, this speed can be adjusted by the outer adjustment screw (A). The maximum no load speed is the last part of the fuel pump setting stamped on the side of the fuel pump. A typical setting code is as follows: 2643J000/CK/1/2960; in this example the maximum no load speed is 2960 rev/min.
With the engine at the normal temperature of operation check that the idle speed is 625 rev/min. If necessary adjustment can be made by the inner adjustment screw (B).